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Full text of "Text Book Of Mechanical Engineering"

5<5o

Schiele's Pivot.

Vog. 573, is generated by a tracMx revolving
on its own axis.    The curve is drawn as follows : Step off equal

divisions i to 10; with radius OB and centre i set off ia and
join: with same radius and centre 2 set off iŁ on 10 and join:
similarly 3*:, 4^, &c.; and then sketch the curve from B to K. This
pivot wears equally on all rings, but wastes more energy in friction:

Moment of friction
or 50% in excess of a flat pivot.

The Limiting Angle of Resistance^

a*perfectly smooth surface as at ., ^574, the

rest